Tender for Cleaning Of Pit Bottom Sump At No 4 Pit Minus 23l Intermediate Sump At No 7 Pit 8l Intermediate Sump And 15l Mid Sump At No 6 Pit Filled With Mud And Muck And Sludge And Fallen Coal,etc In Dobrana R V Seam Of Lower Kenda Colliery For Monsoon Prepar in Bardhaman - West Bengal

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